A former Department of Correction captain who worked at Rikers Island was convicted with his live-in girlfriend yesterday of defrauding the city out of $53,000.

Clarence McGann, 55, owned two properties on Staten Island that he said were rented to tenants eligible for Housing Authority subsidies. But he was living in one of them with his gal pal, Maria Torres, and her children.

McGann and Torres, 47, ran the scam from February 2002 until December 2008. They were arrested last April, and McGann resigned from his $97,000-a- year job in July.

McGann was convicted of grand larceny, and Torres of offering a false instrument for filing.

He faces up to 15 years behind bars, and she could spend up to four years in prison.